f/overrides/event-backup/dnlyx-dividend.csv
Greg Pomerantz bb8e39605e Event-history protection: backup dir, empty-download fallback, docs
Yahoo's 2026 event-feed change (capitalGain events dropped for some
funds; no events at all for terminated tickers) can wipe good event
history on re-download. Defense in depth:

- overrides/event-backup/: last-known-good copy of every dividend/
  capitalGain file (8,192 files, 58 MB); refresh with
  scripts/backup_events.py after each dump update
- data.py event_file(): frozen > data-root (while populated) > backup;
  used by panel reads, verify_official, and the double-listing scanner
- README: capital-gain files are mutual-fund-only in this dump; Yahoo
  has no LT/ST split (tax.py taxes capg at lt_rate; the per-fund split
  would come from fund-company annual tax statements or commercial feeds)
- tests: exact Timestamp .loc keys (pandas 3.x string matching returns a
  Series on large DatetimeIndex)
2026-08-31 21:59:25 -04:00

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Date,Dividends
2019-03-21,0.550000
2020-03-26,0.654000
2020-12-17,1.107000
2022-03-30,2.014000
2023-12-14,0.844000
2016-03-24,0.462000
2017-03-23,0.857000
2018-03-22,1.036000
2022-12-15,2.597000
2024-03-27,0.811000
2024-12-17,4.721000
2025-03-28,1.272000
2017-12-22,6.605000
2018-12-20,4.994000
2023-03-30,0.372000
2015-12-23,1.897000
2016-12-22,0.365000
2019-12-19,1.538000
2021-03-30,0.860000
2021-12-16,10.341000
2025-12-18,8.266000
2026-03-30,0.578000